The Dieffenbachia is accustomed to a humid climate because it is a native of tropical rainforests. In order to prevent a layer of water from accumulating in the pot, ensure that the soil is always just a little bit damp in the summer. It is better to wait to water in the winter until the soil begins to dry. We advise evaluating the soil periodically by inserting your finger into it. It’s time to water when you can stick your index finger up to two knuckles into the ground without feeling any moisture there. After a week, if the soil is still excessively damp, water your houseplant less frequently. You’ve been too frugal if the soil becomes dry once more in two days.